Chapter 8 Flashcards
A storage medium is the?
physical material on which a computer keeps data, information, programs, and applications
Cloud storage does what?
keeps information on servers on the Internet, and the actual media on which the files are stored are transparent to the user
A storage device is the?
hardware that records and/or retrieves items to and from storage media
reading storage is the?
process of transferring items from a storage medium to memory
writing is the process of?
transferring items from memory to a storage medium
megabyte is?
one million bytes
gigabyte is?
one billion bytes
terabyte is?
one trillion bytes
A screen display is considered volatile because?
its contents disappear when power is removed.
A screen display is considered volatile because what?
A screen display is considered volatile because its contents disappear when power is removed. Likewise, most RAM is volatile. That is, its contents are erased when power is removed from a computer or mobile device. Storage, by contrast, is nonvolatile. Its contents remain when power is off.
Access time measures what two things?
The amount of time it takes a storage device to locate an item on a storage medium
The time required to deliver an item from memory to the processor
A hard disk, also called a hard disk drive (HDD) contains?
one or more inflexible, circular platters that use magnetic particles to store data, instructions, and information
The storage capacity of hard disks varies and is determined by 4 things?
The number of platters the hard disk contains
The composition of the magnetic coating on the platters
Whether the disk uses longitudinal or perpendicular recording
Density
Characteristics of a hard disk include?
Tracks Sectors Platters Form factor READ/WRITE HEAD Revolutions per minute
An SSD (solid state drive) is a?
flash memory storage device that contains its own processor to manage its storage
An external hard drive is a?
separate freestanding storage device that connects with a cable to a USB port or other port on a computer or mobile device
RAID (redundant array of independent disks) is a?
group of two or more integrated hard drives
A memory card is a?
removable flash memory storage device that you insert and remove from a slot in a computer, mobile device, or card reader/writer SDHC SDXC miniSD microSDHC
USB flash drives are what?
plug into a USB port on a computer or mobile device
Cloud storage is an?
Internet service that provides storage to computer or mobile device users
An optical disc consists of a?
flat, round, portable disc made of metal, plastic, and lacquer that is written and read by a laser
- Optical discs commonly store items in a single track that spirals from the center of the disc to the edge of the disc
A CD-ROM can be read from but not written to
Single-session disc
A CD-R is an optical disc on which users can write once, but not erase
A CD-RW is an erasable multisession disc
A CD-ROM can be read from but not written to
Single-session disc
A CD-R is an optical disc on which users can write once, but not erase
A CD-RW is an erasable multisession disc
A DVD-ROM is a high-capacity optical disc on which users can read but not write on or erase
A DVD-R or DVD+R are competing DVD-recordable WORM formats, on which users can write once but not erase
DVD-RW, DVD+RW, and DVD+RAM are competing DVD-rewritable formats that users can write on multiple times
A DVD-ROM is a high-capacity optical disc on which users can read but not write on or erase
A DVD-R or DVD+R are competing DVD-recordable WORM formats, on which users can write once but not erase
DVD-RW, DVD+RW, and DVD+RAM are competing DVD-rewritable formats that users can write on multiple times
Enterprise hardware does what?
allows large organizations to manage and store data and information using devices intended for heavy use, maximum efficiency, and maximum availability
RAID duplicates data, instructions, and information to improve data reliability
